Water sensor probes can be installed in diesel fuel filter bowls to alert you when water has accumulated in the bowl and it is time to drain.
This kit includes a probe and an under-dash dectection module with both a "Drasin" light and an audible buzzer alarm.

Unlike Racor's other detection modules, the RK 12870 is designed for the easily distracted captain - it has no alarm mute function. The light illuminates, and the buzzer sounds until you drain the water from the filter bowl (with the engine off).

Can be used with any Racor filter
Includes RK 21069 probe, alarm panel with wire harness, various wire splicers for user supplied connecting wires
Red DRAIN lamp (only) illuminates continuously when water is detected (no green "power available" indicator light)
Buzzer sounds continuously when water is detected
Automatically resets when water is drained
Does not include self-diagnostics or circuit protection
Do not use in gasoline applications - explosion hazard